Year: 2024
Type: article
Abstract: This paper presents an implementation of the noniterative eigenchannel $R$-matrix method for the Dirac equation. It includes a brief introduction, implementation details, and results for the photoionization cross section of the beryllium atom. Beryllium is a convenient test due to small but significant relativistic effects. Our calculation aligns with other $R$-matrix calculations and experiments. It observes the change in the Fano line shape of the $(2pnd){\phantom{\rule{0.16em}{0ex}}}^{1}P$ series and reveals a coupling between triplet and singlet series observable in the ground-state photoionization cross section.
Source: Physical Review A
Authors: Miguel A. Alarcón, Chris H. Greene
Institution: Purdue University West Lafayette
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4403811169